The ignition occurs when a mixture of fuel & oxygen encounter an external heat source with sufficient heat<u> Piloted ignition.</u>
<h3>
What is Piloted ignition?</h3>
When a volatile fuel is close to a nearby local energy source (pilot) and reaches its lower limit of flammability in air, piloted ignition may be possible. The flame that originates in the premixed system spreads outward from the pilot. The first law of thermodynamics for systems with fixed mass only describes the energetics of this process.
<h3>Definition of thermodynamics </h3>
The science of thermodynamics examines how heat, work, temperature, and energy are related. The general topic of thermodynamics is the transfer of energy from one location or form to another. The fundamental idea is that heat is a type of energy that is equivalent to a specific quantity of mechanical labor.
To learn more about ignition
brainly.com/question/6481027
#SPJ4
Look at the instructions or listen to orders
Answer:
The final temperature of water is <u>20.5061 °C.</u>
Explanation:
Let the final temperature of water be 'x'.
Given:
Heat added to water is, ![Q_{in}=12.15\ J](https://tex.z-dn.net/?f=Q_%7Bin%7D%3D12.15%5C%20J)
Initial temperature of water is, ![T=20.5\ \°C](https://tex.z-dn.net/?f=T%3D20.5%5C%20%5C%C2%B0C)
Mass of water is, ![m=475\ g](https://tex.z-dn.net/?f=m%3D475%5C%20g)
Now, heat is added to water and its temperature is increased. The temperature is increased because water absorbs all the heat.
Heat absorbed by water is given as:
where 'c' is specific heat capacity of water and its value is equal to 4.186 J/g °C.
Now, plug in the given values and simplify.
![Q_{abs}=475\times4.186\times(x-20.5)\\Q_{abs}=1988.35(x-20.5)](https://tex.z-dn.net/?f=Q_%7Babs%7D%3D475%5Ctimes4.186%5Ctimes%28x-20.5%29%5C%5CQ_%7Babs%7D%3D1988.35%28x-20.5%29)
Now, from law of conservation of energy, we know that:
Heat absorbed by water = Heat added to water
![Q_{abs}=Q_{in}\\1988.35(x-20.5)=12.15\\x-20.5=\frac{12.15}{1988.35}\\x-20.5=0.0061\\x=20.5+0.0061=20.5061\ \°C](https://tex.z-dn.net/?f=Q_%7Babs%7D%3DQ_%7Bin%7D%5C%5C1988.35%28x-20.5%29%3D12.15%5C%5Cx-20.5%3D%5Cfrac%7B12.15%7D%7B1988.35%7D%5C%5Cx-20.5%3D0.0061%5C%5Cx%3D20.5%2B0.0061%3D20.5061%5C%20%5C%C2%B0C)
So, the final temperature of water is 20.5061 °C.
Answer:
-368.62 kJ/mol
Explanation:
[(2 x - 470.11 kJ/mol) ( 0kJ/mol)] - [ 2 x -285.8 kJ/mol) (2x 0 kj/mol)] = -368.62 kJ/mol